When to Plant in Des Moines, IA

In Des Moines, garden planning is essential due to its unique climate conditions. The median last spring frost occurs around April 25, and the first fall frost typically happens by October 6, providing gardeners with approximately 164 frost-free days each year. This growing period allows for a wide variety of plants, but also necessitates careful timing to ensure crops can thrive before the colder temperatures set in.

The microclimate of the humid continental Great Plains significantly influences what can be successfully cultivated in Des Moines. Crops such as corn, soybeans, and various fruits like apples and berries thrive due to the warm summers and adequate rainfall typical of this region. Conversely, more delicate crops such as tomatoes and peppers often struggle due to the rapid fluctuations in temperature and the risk of late spring frosts, which can impede their development.

What to plant now in Des Moines

Now is the time to start planning for your summer garden. Consider planting cool-weather crops like peas and spinach in early April, which will thrive before the last frost on April 25.
As temperatures warm up, begin transplanting tomatoes and peppers outdoors after the last frost date of April 25, ensuring they have enough time to grow into summer before the first fall frost on October 6.
With summer in full swing, it’s vital to keep an eye on moisture levels in your garden. Hardier crops such as squash and beans can be planted in late May, utilizing the frost-free days wisely.
As fall approaches, prepare for the harvest season. Late August to early September is ideal for planting fall crops such as kale and carrots, allowing them to mature before the first frost on October 6.

In Des Moines (164 frost-free days, a moderate season), 31 of 56 planner crops fit outright, 24 get two plantings, 1 crop is perennial.

Month by month in Des Moines

Month	What to do
January	January is a quiet month for gardening in Des Moines, but it's the perfect time to plan your spring garden. Start researching your favorite vegetables and order seeds for cool-weather crops.
February	As February progresses and temperatures remain low, consider starting seeds indoors for early vegetables like tomatoes and peppers. This head start will be beneficial for planting after April 25.
March	March is when garden preparation begins. Start turning the soil in your garden beds, remove weeds, and cultivate compost to enrich the soil ahead of planting after the last frost.
April	In April, be vigilant about the last frost date of April 25. Plant cool-weather crops like peas and lettuce early in the month, but wait until after this date to plant peppers and tomatoes.
May	With May's warm weather, it’s a prime time for planting warm-season crops. Tomatoes, cucumbers, and squash can be planted once the risk of frost is over after April 25.
June	June brings warmth and growth. Maintain regular watering and start harvesting early crops. This is also a great month for succession planting of crops like beans.
July	July represents peak summer gardening. Keep an eye on soil moisture and prepare for late summer plantings such as fall crops. This is the time to sow seeds for kale and turnips.
August	In August, the temperature begins to cool slightly, but there is still ample time for planting. Focus on planting late summer crops and preparing for fall with sowings of lettuce and radishes.
September	September is critical for preparing for the upcoming frost. Harvest remaining summer crops early in the month and plant fall crops to ensure they mature before the first frost on October 6.
October	As October approaches, watch for the first frost around October 6. Complete your fall harvest and consider planting cover crops to enhance soil health over the winter months.
November	November starts the winter season in Des Moines. Clear out old plants and prepare your garden for winter. This is a good time to assess your gardening successes and plan for next year.
December	December is a time for rest in the garden. Reflect on last year's growing season, keep planning for spring, and enjoy the first snowfall of winter while your garden lies dormant.

Frost dates for Des Moines ZIP codes

ZIP	Last spring frost (50%)	First fall frost (50%)	Zone
50317	April 25	October 6	5b
50315	April 25	October 6	5b
50314	April 25	October 6	5b
50309	April 25	October 6	5b

FAQ

When is the last frost in Des Moines?

The last frost in Des Moines typically occurs around April 25, making it crucial for gardeners to plan their spring planting around this date.

What vegetables grow best in Des Moines?

Corn, soybeans, and strawberries flourish in Des Moines due to the warm summers and sufficient rainfall, while more sensitive crops like cucumbers may need special care.

When should I plant tomatoes in Des Moines?

Tomatoes should be transplanted outdoors after the last frost date of April 25 to ensure they thrive during the summer months.

Can I garden year-round in Des Moines?

While gardening is limited in winter due to harsh weather, starting seeds indoors can extend the growing season, allowing for year-round gardening activities.

How does Plan My Garden help Des Moines gardeners?

Plan My Garden provides tailored advice, frost dates, and planting calendars to help gardeners in Des Moines optimize their growing experience.

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